Display panel, driving method thereof, and display device

Abstract

This disclosure provides a display panel and its driving method and display device, relating to the field of display technology. The display panel includes multiple light-emitting devices. The anode of each light-emitting device is electrically connected to a first reset signal, and the cathode is electrically connected to a first power supply voltage signal. The first reset signal is used to reset the anode of the light-emitting device, and the first power supply voltage signal is used to provide a voltage signal to the cathode of the light-emitting device. The display panel includes multiple brightness levels. The driving method of the display panel includes: when the brightness level of the display panel changes, the first reset signal and the first power supply voltage signal simultaneously begin switching. This configuration helps to shorten the time difference between the activation time of the first reset signal and the activation time of the first power supply voltage signal, thereby improving the flickering phenomenon of the display panel, improving the display effect of the display panel, and enhancing the user experience.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display panel and its driving method, and a display device. Background Technology

[0002] With the development of display technology, people have increasingly higher requirements for the performance of display panels. In related technologies, when adjusting the display brightness level, there is a phenomenon of sudden changes in display brightness, i.e., screen flickering, which seriously affects the display effect of the display panel.

[0003] Therefore, how to improve the above problems has become one of the urgent technical issues to be addressed at this stage. Summary of the Invention

[0004] To address the aforementioned technical problems, this disclosure provides a display panel and its driving method, as well as a display device, to improve the screen flickering phenomenon of the display panel when the brightness level of the display panel changes.

[0005] In a first aspect, this disclosure provides a driving method for a display panel, the display panel including a plurality of light-emitting devices, the anode of the light-emitting devices being electrically connected to a first reset signal, and the cathode being electrically connected to a first power supply voltage signal, the first reset signal being used to reset the anode of the light-emitting devices, and the first power supply voltage signal being used to provide a voltage signal to the cathode of the light-emitting devices;

[0006] The display panel includes multiple brightness levels;

[0007] The driving method for the display panel includes:

[0008] When the brightness level of the display panel changes, the first reset signal and the first power supply voltage signal simultaneously begin to switch.

[0009] Secondly, this disclosure provides a display panel that is driven using the display panel driving method described in the first aspect.

[0010] Thirdly, this disclosure provides a display device, including the display panel described in the second aspect.

[0011] The display panel includes multiple light-emitting devices. The anode of each light-emitting device is electrically connected to a first reset signal, and the cathode is electrically connected to a first power supply voltage signal. The first reset signal is used to reset the anode of the light-emitting device, and the first power supply voltage signal is used to provide a voltage signal to the cathode of the light-emitting device.

[0012] The display panel includes multiple brightness levels;

[0013] A power management integrated circuit, wherein the first power supply voltage signal is electrically connected to the power management integrated circuit, and the power management integrated circuit adjusts the first power supply voltage signal when the brightness level of the display panel changes;

[0014] The driver chip is electrically connected to the first reset signal. When the brightness level of the display panel changes, the driver chip adjusts the first reset signal.

[0015] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0016] This disclosure provides a display panel and its driving method and display device. The display panel includes multiple light-emitting devices. The anode of each light-emitting device is electrically connected to a first reset signal, and the cathode is electrically connected to a first power supply voltage signal. The first reset signal is used to reset the anode of the light-emitting device, and the first power supply voltage signal is used to provide a voltage signal to the cathode of the light-emitting device. The display panel includes multiple brightness levels. The driving method of the display panel includes: when the brightness level of the display panel changes, the first reset signal and the first power supply voltage signal simultaneously begin switching. This configuration helps to shorten the time difference between the activation time of the first reset signal and the activation time of the first power supply voltage signal, thereby improving the screen flicker phenomenon of the display panel, improving the display effect of the display panel, and enhancing the user experience. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0018] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 The diagram shown is a schematic representation of a display panel provided in an embodiment of this disclosure;

[0020] Figure 2 The diagram shown is a connection schematic of a light-emitting device provided in an embodiment of this disclosure;

[0021] Figure 3 The figure shows a timing diagram of a driving method for a display panel in the prior art;

[0022] Figure 4 The figure shown is a timing diagram of a driving method for a display panel provided in an embodiment of this disclosure;

[0023] Figure 5 The diagram shown is a schematic diagram of a driving circuit for a light-emitting device provided in an embodiment of this disclosure;

[0024] Figure 6 As shown Figure 5 A timing diagram of a driving circuit;

[0025] Figure 7 The figure shown is a timing diagram of another display panel driving method provided in an embodiment of this disclosure;

[0026] Figure 8 The diagram shown is a timing diagram of another display panel driving method provided in an embodiment of this disclosure;

[0027] Figure 9 The diagram shown is a schematic diagram of a display device provided in an embodiment of this disclosure. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0029] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0030] The inventors discovered during their research that when some display panels are used in different scenarios, dragging the overall brightness bar (i.e., changing the brightness level of the display panel) causes a flickering phenomenon during the brightness switching, which seriously affects the display effect and user experience.

[0031] Therefore, how to improve the screen flickering phenomenon of the display panel when the brightness level changes has become one of the technical problems that urgently need to be solved at this stage.

[0032] In view of this, the present disclosure provides a display panel and its driving method and display device to improve the screen flickering phenomenon of the display panel when the brightness level of the display panel changes.

[0033] Figure 1 The diagram shown is a schematic representation of a display panel provided in an embodiment of this disclosure. Figure 2 The diagram shown is a connection schematic of a light-emitting device provided in an embodiment of this disclosure. Figure 3 The figure shown is a timing diagram of a driving method for a display panel in the prior art. Figure 4The diagram shown is a timing illustration of a driving method for a display panel according to an embodiment of this disclosure. Please refer to it. Figures 1-3 This disclosure provides a driving method for a display panel 100. The display panel 100 includes a plurality of light-emitting devices D0. The anode of the light-emitting device D0 is electrically connected to a first reset signal Vref1, and the cathode is electrically connected to a first power supply voltage signal PVEE. The first reset signal Vref1 is used to reset the anode of the light-emitting device D0, and the first power supply voltage signal PVEE is used to provide a voltage signal to the cathode of the light-emitting device D0.

[0034] Display panel 100 includes multiple brightness levels;

[0035] The driving methods for the display panel 100 include:

[0036] When the brightness level of the display panel 100 changes, the first reset signal Vref1 and the first power supply voltage signal PVEE start switching simultaneously.

[0037] It should be noted that the accompanying drawings in this disclosure are only illustrative examples of a rectangular display panel 100 and an array arrangement of light-emitting devices (DO), and are not intended to limit the scope of the display panel 100, nor do they represent the actual size and structure of the display panel 100. The display panel 100 typically includes different brightness modes in its operating modes. For example, the display panel 100 may include a high-brightness mode to meet user requirements for higher display brightness, and a low-brightness mode to meet user requirements for lower display brightness. Therefore, the display panel 100 includes multiple brightness levels (Display Brightness Value, DBV). By adjusting these brightness levels, the overall brightness of the display panel 100 can be adjusted, thereby enabling the display panel 100 to meet different brightness display modes required by the user.

[0038] The display panel 100 includes multiple light-emitting devices D0. The anode and cathode of each light-emitting device D0 are electrically connected to a first reset signal Vref1 and a first power supply voltage signal PVEE, respectively. The first power supply voltage signal PVEE is used to provide a voltage signal to the cathode of the light-emitting device D0. Please refer to [reference needed]. Figure 3In related technologies, when the brightness level of the display panel 100 changes, the voltage of the first power supply voltage signal PVEE changes accordingly. The switching process of the first power supply voltage signal PVEE is a gradual voltage change process. The first reset signal Vref1 is used to provide a signal to the anode of the light-emitting device D0. When the brightness level of the display panel 100 changes, the voltage of the first reset signal Vref1 directly switches to a preset voltage. The effective time of the voltage switching of the first power supply voltage signal PVEE is during the effective display phase ACT of the display panel 100. The switching time of the first reset signal Vref1 is during the front and rear corridor phases Porch. If the voltage switching time of the first reset signal Vref1 is much earlier than the voltage switching time of the first power supply voltage signal PVEE, it will affect the normal display of the display panel 100 during the effective display phase ACT, and the display panel 100 will exhibit obvious screen flickering.

[0039] Please refer to Figure 1 , Figure 2 and Figure 4 The driving method of the display panel 100 provided in this disclosure includes: when the brightness level of the display panel 100 changes, the first reset signal Vref1 and the first power supply voltage signal PVEE start switching simultaneously. This helps to shorten the time difference between the effective time of the first reset signal Vref1 and the effective time of the first power supply voltage signal PVEE, thereby helping to improve the screen flickering phenomenon of the display panel 100, improve the display effect of the display panel 100, and enhance the user experience.

[0040] It should be noted that this disclosure is only for the purpose of... Figure 4 The illustrated embodiments are described below, and detailed descriptions will be provided in subsequent embodiments.

[0041] To more clearly illustrate the driving principle of the light-emitting device D0, this disclosure optionally provides an embodiment of the driving circuit for the light-emitting device D0. Figure 5 The diagram shown is a schematic of a driving circuit for a light-emitting device according to an embodiment of this disclosure. Please refer to it. Figure 5The driving circuit 000 is electrically connected to the light-emitting device D0. The driving circuit 000 includes: a first transistor M1, a second transistor M2, a third transistor M3, a fourth transistor M4, a fifth transistor M5, a sixth transistor M6, a seventh transistor M7, and a capacitor C. The first and second terminals of the seventh transistor M7 are respectively connected to the first reset signal Vref1 and the anode of the light-emitting device D0, and are used to reset the anode of the light-emitting device D0. The cathode of the light-emitting device D0 is connected to the first power supply voltage signal PVEE. The third transistor M3 is a driving transistor, which is used to provide driving current to the light-emitting device D0. The gate, first terminal, and second terminal of the driving transistor are respectively connected to the first node N1, the second node N2, and the third node N3. The first and second terminals of the first transistor M1 are connected to the second power supply voltage signal PVDD and the second node N2, respectively, for transmitting the second power supply voltage signal PVDD to the first terminal of the driving transistor; the first and second terminals of the second transistor M2 are connected to the data voltage signal Vdata and the second node N2, respectively, for transmitting the data voltage signal Vdata to the second node N2; the first and second terminals of the fourth transistor M4 are connected to the first node N1 and the third node N3, respectively, for threshold compensation of the third transistor M3; the first and second terminals of the fifth transistor M5 are connected to the second reset signal Vref2 and the first node N1, respectively, for providing the second reset signal Vref2 to the first node N1; the first and second terminals of the sixth transistor M6 are connected to the third node N3 and the first terminal of the light-emitting device D0, respectively, for transmitting the driving current to the light-emitting device D0.

[0042] Figure 6 As shown Figure 5 A timing diagram of a driver circuit, please refer to... Figure 5 and Figure 6The specific workflow of the driving circuit 000 includes an initialization phase T1, a data writing phase T2, and a light-emitting phase T3. In the initialization phase T1, the fifth transistor M5 is turned on, transmitting the second reset signal Vref2 to the control terminal of the third transistor M3 for initialization, thereby eliminating residual charge from the previous frame and improving the display effect of the display panel. In the data writing phase T2, the fifth transistor M5 is turned off, and the second transistor M2, the fourth transistor M4, and the seventh transistor M7 are turned on, writing the data voltage signal Vdata to the third transistor M3. The fourth transistor M4 is connected between the gate and the second electrode of the third transistor M3, capturing the threshold voltage of the third transistor M3 to its gate for threshold voltage compensation. Simultaneously, the seventh transistor M7 transmits the first reset signal Vref1 to the anode of the light-emitting device D0 for reset, clearing residual charge from the previous frame and enabling the light-emitting device D0 to more accurately display the brightness to be displayed, thereby improving the display effect of the display panel 100. It should be noted that the reset process of the light-emitting device D0 can also be performed in the initialization phase T1, and this disclosure does not limit this process. Furthermore, capacitor C is connected between the gate of the third transistor M3 and the first electrode of the first transistor M1, maintaining the potential of the first node N1. During the light-emitting stage T3, the second transistor M2, the fourth transistor M4, the fifth transistor M5, and the seventh transistor M7 are all off, while the first transistor M1, the third transistor M3, and the sixth transistor M6 are all on, driving current to the first electrode of the light-emitting device D0, causing D0 to emit light. It should be noted that this disclosure only uses… Figure 5 The driving circuit will be explained using an example. Figure 6 The timing diagrams are for illustrative purposes only and are not intended to limit the scope of the invention. In some other embodiments of this disclosure, the driving circuit may be embodied in other feasible structures. Furthermore, this disclosure does not limit the type of transistors in the driving circuit.

[0043] Based on the basic principle of the light-emitting device D0, it can be concluded that when the brightness level of the display panel 100 changes, the first reset signal Vref1 and the first power supply voltage signal PVEE switch simultaneously, which helps to stabilize the voltage difference between the anode and cathode of the light-emitting device D0, thereby helping to improve the screen flickering phenomenon of the display panel 100, improve the display effect of the display panel 100, and enhance the user experience.

[0044] Figure 7 The diagram shown is a timing illustration of another display panel driving method provided in this embodiment. Please refer to it. Figure 1 , Figure 2 and Figure 7 In one optional embodiment of this disclosure, the switching processes of the first reset signal Vref1 and the first power supply voltage signal PVEE are the same.

[0045] Specifically, in this embodiment, the switching of the first reset signal Vref1 and the first power supply voltage signal PVEE is linked. That is, the first reset signal Vref1 follows the switching process of the first power supply voltage signal PVEE. The switching process of the first power supply voltage signal PVEE is gradually generated, and the switching process of the first reset signal Vref1 is also gradually generated. This helps to stabilize the voltage difference between the anode and cathode of the light-emitting device D0, thereby helping to improve the screen flickering phenomenon of the display panel 100, improve the display effect of the display panel 100, and enhance the user experience.

[0046] Please continue to refer to this. Figure 1 , Figure 2 and Figure 7 Furthermore, this disclosure provides an optional implementation in which the display panel 100 includes a voltage switching stage S1. In the voltage switching stage S1, the first power supply voltage signal PVEE is adjusted from the first sub-power supply voltage value VP1 to the second sub-power supply voltage value VP2, and the first reset signal Vref1 is adjusted from the first sub-reset voltage value VV1 to the second sub-reset voltage value VV2.

[0047] At the beginning of the voltage switching phase S1, the voltage of the first power supply voltage signal PVEE is equal to the first sub-power supply voltage value VP1, and the voltage of the first reset signal Vref1 is equal to the first sub-reset voltage value VV1.

[0048] At the end of voltage switching phase S1, the voltage of the first power supply voltage signal PVEE is equal to the voltage of the second sub-power supply voltage VP2, and the voltage of the first reset signal Vref1 is equal to the voltage of the second sub-reset voltage VV2.

[0049] It should be noted that the voltage switching stage S1 is the period from the start of switching of the first power supply voltage signal PVEE and the first reset signal Vref1 to the completion of switching when the display panel 100 switches the brightness level.

[0050] Specifically, when the display panel 100 switches brightness levels, it enters a voltage switching phase S1. During this phase, the first power supply voltage signal PVEE completes a voltage switch, adjusting from a first sub-power supply voltage value VP1 to a second sub-power supply voltage value VP2. Here, VP1 is the voltage value of the first power supply voltage signal PVEE before adjustment, and VP2 is the target voltage value after adjustment. Also during phase S1, the first reset signal Vref1 completes a voltage switch, adjusting from a first sub-reset voltage value VV1 to a second sub-reset voltage value VV2. Here, VV1 is the voltage value of the first reset signal Vref1 before adjustment, and VV2 is the target voltage value after adjustment. At the beginning of phase S1, the voltage of the first power supply voltage signal PVEE is equal to the first sub-power supply voltage value VP1, and the voltage of the first reset signal Vref1 is equal to the first sub-reset voltage value VV1. That is, the first reset signal Vref1 and the first power supply voltage signal PVEE begin adjusting their voltages simultaneously. At the end of voltage switching phase S1, the voltage of the first power supply voltage signal PVEE is equal to the second sub-power supply voltage value VP2, and the voltage of the first reset signal Vref1 is equal to the second sub-reset voltage value VV2. That is, at the end of voltage switching phase S1, the first power supply voltage signal PVEE is adjusted to the target voltage, and the first reset signal Vref1 is also adjusted to the target voltage. In other words, the first reset signal Vref1 and the first power supply voltage signal PVEE complete voltage switching simultaneously. With this setting, the voltage difference between the anode and cathode of the light-emitting device D0 can remain consistent or basically consistent before and after adjustment, which is beneficial to stabilizing the voltage difference between the anode and cathode of the light-emitting device D0. This helps to improve the screen flickering phenomenon of the display panel 100, improve the display effect of the display panel 100, and enhance the user experience.

[0051] Furthermore, this disclosure provides another optional implementation in which the voltage difference between the first power supply voltage signal PVEE and the first reset signal Vref1 remains consistent during a sub-period in the voltage switching phase S1. That is, the first reset signal Vref1 completely "replicates" the generation trajectory of the first power supply voltage signal PVEE, which is more conducive to maintaining the voltage difference between the anode and cathode of the light-emitting device D0 and is more conducive to improving the flickering phenomenon of the display panel 100.

[0052] Please refer to Figure 1 , Figure 2 and Figure 4 In one optional embodiment of this disclosure, the display phase of the display panel 100 includes an effective display phase ACT and a front and rear corridor phase Porch.

[0053] The switching time between the first reset signal Vref1 and the first power supply voltage signal PVEE is during the front and rear corridor phase (Porch).

[0054] Specifically, the front and rear corridor phase (Porch) is the pre-charging phase corresponding to each driving cycle. During this phase, the sub-pixels in the display panel 100 are not scanned, i.e., the light-emitting device D0 is not driven. The effective display phase (ACT) is the time period during which the sub-pixels in the display panel 100 are actually scanned. During this phase, the light-emitting device D0 in the display panel 100 is driven to emit light. In this embodiment, the first reset signal Vref1 and the first power supply voltage signal PVEE are switched during the front and rear corridor phase (Porch). During the front and rear corridor phase (Porch), the display panel 100 is not in an effective display state. Switching the first reset signal Vref1 and the first power supply voltage signal PVEE during the front and rear corridor phase (Porch) helps to reduce the impact on the display effect of the display panel 100, reduce the occurrence of screen flickering problems, and improve the display effect.

[0055] It should be noted that in some optional implementations, the switching of the first power supply voltage signal PVEE is usually in the effective display phase ACT. In this embodiment, it is equivalent to extending the duration of the front and rear corridor period Porch, so that the first power supply voltage signal PVEE completes the switching during the front and rear corridor period Porch.

[0056] For further information, please continue to refer to [link / reference]. Figure 1 , Figure 2 and Figure 4 The present disclosure provides an optional implementation in which the display panel 100 includes a first power supply voltage signal switching stage S11, in which the first power supply voltage signal is adjusted from a first sub-power supply voltage value VP1 to a second sub-power supply voltage value VP2.

[0057] The duration of the first power supply voltage signal switching phase S11 is less than or equal to the duration of a single front and rear corridor phase Porch.

[0058] Specifically, the display panel 100 includes a first power supply voltage signal switching stage S11. When the brightness level of the display panel 100 changes, in the first power supply voltage signal switching stage S11, the first power supply voltage signal PVEE completes voltage adjustment, changing from a first sub-power supply voltage value VP1 to a second sub-power supply voltage value VP2. The first sub-power supply voltage value VP1 is the voltage before adjustment, and the second sub-power supply voltage value VP2 is the target voltage. In order to complete the switching of the first power supply voltage signal PVEE in the front and rear corridor phases, this embodiment sets the duration of the first power supply voltage signal PVEE switching stage to be less than or equal to the duration of a single front and rear corridor phase. In this way, the first power supply voltage signal PVEE completes the switching in the front and rear corridor phases, which helps to reduce the impact of voltage switching on the effective display stage ACT, thereby improving the display effect of the display panel 100.

[0059] Please continue to refer to this. Figure 1 , Figure 2 and Figure 4 In one optional embodiment of this disclosure, at the end of the front and rear corridor phases of Porch, the voltage value of the first power supply voltage signal PVEE is equal to the voltage value of the second sub-power supply voltage VV2.

[0060] Specifically, in some embodiments, due to the communication protocol requirements of the power management integrated circuit 20 of the display device 200, the voltage of the first power supply voltage signal PVEE cannot be generated during the front and rear corridor phases. Therefore, at the end of the front and rear corridor phases, the voltage of the first power supply voltage signal PVEE is adjusted to the second sub-power supply value VV2. That is, at the end of the front and rear corridor phases, the first power supply voltage signal PVEE completes the switching. In this way, the communication protocol requirements of the power management integrated circuit 20 are met, and the impact on the effective display phase ACT of the display panel 100 is reduced. This helps to reduce the impact on the display effect of the display panel 100, reduce the occurrence of screen flickering problems, and improve the display effect.

[0061] Please continue to refer to this. Figure 1 , Figure 2 and Figure 4 In one optional embodiment of this disclosure, the generation time of the first reset signal Vref1 is included, and the generation time of the first reset signal Vref1 is located at the beginning of the first power supply voltage signal switching stage S11.

[0062] At the moment the first reset signal Vref1 is generated, the voltage of the first reset signal Vref1 is equal to the second sub-reset voltage value VV2.

[0063] Specifically, in this embodiment, the first power supply voltage signal switching stage S11 overlaps with the front and rear corridor stages Porch. The first power supply voltage signal switching stage S11 is located within the front and rear corridor stages Porch, that is, the first power supply voltage signal PVEE begins to switch during the front and rear corridor stages Porch. The first reset signal Vref1 is generated in a direct generation mode. At the moment the first reset signal Vref1 is generated, the first reset signal Vref1 begins to switch and completes the switching, switching to the second sub-reset voltage value VV2, which is the target voltage. With this setting, at the end of the front and rear corridor stages Porch, both the first power supply voltage signal PVEE and the first reset signal Vref1 can complete the switching. The front and rear corridor stages Porch do not scan the pixels in the display panel 100. Therefore, switching the first power supply voltage signal PVEE and the first reset signal Vref1 during this stage helps to reduce the impact on the display effect of the display panel 100 and improve the flickering phenomenon when the brightness level of the display panel 100 changes.

[0064] Figure 8 The diagram shown is a timing diagram of another display panel driving method provided in this disclosure embodiment. Please refer to it. Figure 1 , Figure 2 and Figure 8 In another optional implementation, when the brightness level of the display panel 100 changes, the first power supply voltage signal PVEE switches during the front and rear corridor phases, and the first reset signal Vref1 also switches during the front and rear corridor phases. Simultaneously, the switching processes of the first power supply voltage signal PVEE and the first reset signal Vref1 are the same, both being gradual changes. The first power supply voltage signal PVEE is adjusted from a first sub-power supply voltage value VP1 to a second sub-power supply voltage value VP2; the first reset signal Vref1 is adjusted from a first sub-reset voltage value VV1 to a second sub-reset voltage value VV2. At the end of the front and rear corridor phases, the voltage of the first power supply voltage signal PVEE is equal to the second sub-power supply voltage value VP2, and the voltage of the first reset signal Vref1 is equal to the second sub-reset voltage value VV2. In this embodiment, the switching process of the first power supply voltage signal PVEE and the first reset signal Vref1 is the same, and the switching is performed in the front and rear corridor stages. This not only helps to reduce the impact on the effective display stage ACT of the display panel 100, but also helps to stabilize the voltage difference between the anode and cathode of the light-emitting device D0. Furthermore, it helps to improve the screen flickering phenomenon of the display panel 100, improve the display effect of the display panel 100, and enhance the user experience.

[0065] Based on the same inventive concept, this disclosure provides a display panel, please refer to... Figure 1 , Figure 2 and Figure 4The display panel 100 is driven by any of the display panel driving methods provided in the embodiments of this disclosure.

[0066] It should be noted that the embodiments of the display panel 100 provided in this disclosure can be referred to the embodiments of the driving method for the display panel provided in this disclosure, and will not be repeated here. When the brightness level of the display panel 100 provided in this disclosure changes, the switching of the first power supply voltage signal PVEE and the first reset signal Vref1 has little impact on the effective display phase ACT of the display panel 100, which is beneficial to improving the display effect of the display panel 100 and thus improving the user experience.

[0067] Based on the same inventive concept, this disclosure also provides a display device. Figure 9 The diagram shown is a schematic representation of a display device provided in an embodiment of this disclosure. Please refer to it. Figure 1 , Figure 2 , Figure 4 and Figure 9 The display device 200 includes a display panel 100 provided in the embodiments of the present disclosure. The display panel 100 includes a plurality of light-emitting devices D0. The anode of the light-emitting device D0 is electrically connected to a first reset signal Vref1, and the cathode is electrically connected to a first power supply voltage signal PVEE. The first reset signal Vref1 is used to reset the anode of the light-emitting device D0, and the first power supply voltage signal PVEE is used to provide a voltage signal to the cathode of the light-emitting device D0.

[0068] Display panel 100 includes multiple brightness levels;

[0069] The power management integrated circuit 20 is electrically connected to the first power supply voltage signal PVEE. When the brightness level of the display panel 100 changes, the power management integrated circuit 20 adjusts the first power supply voltage signal PVEE.

[0070] The driver chip 10 is electrically connected to the first reset signal Vref1. When the brightness level of the display panel 100 changes, the driver chip 10 adjusts the first reset signal Vref1.

[0071] Specifically, the display device 200 provided in this disclosure includes a display panel 100 provided in the embodiments of this disclosure. The display panel 100 is driven using the driving method of the display panel provided in the embodiments of this disclosure. The display panel 100 includes a plurality of light-emitting devices D0. The anode and cathode of the light-emitting devices D0 are electrically connected to a first reset signal Vref1 and a first power supply voltage signal PVEE, respectively. The display panel 100 includes a plurality of brightness levels. The first power supply voltage signal PVEE is used to provide a voltage signal to the cathode of the light-emitting devices D0. When the brightness level of the display panel 100 changes, the voltage of the first power supply voltage signal PVEE will change accordingly. The first reset signal Vref1 is used to provide a signal to the anode of the light-emitting devices D0. When the brightness level of the display panel 100 changes, the voltage of the first reset signal Vref1 will also change. The display panel 100 also includes a power management integrated circuit 20 and a driver chip 10. The driver chip 10 transmits the first reset signal Vref1 to the light-emitting devices D0 through a first reset signal line 21, and the power management integrated circuit 20 transmits the first power supply voltage signal PVEE to the light-emitting devices D0 through a first power supply voltage signal line 11. When the brightness level of the display panel 100 changes, the power management integrated circuit 20 adjusts the first power supply voltage signal PVEE, and the driver chip 10 adjusts the first reset signal Vref1. When the brightness level of the display panel 100 changes, the power management integrated circuit 20 and the driver chip 10 switch simultaneously. This helps to shorten the time difference between the activation of the first reset signal Vref1 and the activation of the first power supply voltage signal PVEE, thereby improving the flickering phenomenon of the display panel 100, enhancing the display effect, and improving the user experience.

[0072] It should be noted that this embodiment is only described using the example of each column of light-emitting devices D0 being connected to the same first power supply voltage signal line 11, and the first power supply voltage signal line 11 being connected to the power management integrated circuit 20. The wiring of the first power supply voltage signal line 11 is not limited; for example, the first power supply voltage signal line 11 can also be a planar structure. Similarly, this embodiment does not limit the specific wiring structure of the first reset signal line 21.

[0073] It should also be noted that the power management integrated circuit (PMIC) 20 of the display device 200 plays a crucial role in the display device 200. The display device 200 typically requires various voltages to drive different parts of the display device 200, such as the pixel driving circuit and the gate driving circuit. The power management integrated circuit 20 provides different stable voltages to the display device 200.

[0074] Please refer to Figure 1 , Figure 2 , Figure 7 and Figure 9 In one optional embodiment of this disclosure, when the brightness level of the display panel 100 changes,

[0075] The power management integrated circuit 20 controls the first power supply voltage signal PVEE to be adjusted from the first sub-power supply voltage value VP1 to the second sub-power supply voltage value VP2;

[0076] The driver chip 10 controls the first reset signal Vref1 to be adjusted from the first sub-reset voltage value VV1 to the second sub-reset voltage value VV2.

[0077] Specifically, when the brightness level of the display panel 100 changes, the first power supply voltage signal PVEE and the first reset signal Vref1 need to be adjusted according to the brightness level. The power management integrated circuit 20 is used to adjust the first power supply voltage signal PVEE, and the driver chip 10 is used to adjust the first reset signal Vref1. The first sub-power supply voltage value VP1 is the voltage value before adjustment, and the second sub-power supply voltage value VP2 is the target power supply value. When the brightness level of the display panel 100 changes, the first power supply voltage signal PVEE is adjusted from the first sub-power supply voltage value VP1 to the second sub-power supply voltage value VP2. The first sub-reset voltage value VV1 is the voltage value before adjustment, and the second sub-reset voltage value VV2 is the voltage value before adjustment. When the brightness level of the display panel 100 changes, the first power supply voltage signal PVEE is adjusted from the first sub-reset voltage value VV1 to the second sub-power supply voltage value VV2. When the display panel 100 provided in this disclosure is driven, at the beginning of the voltage switching phase S1, the first reset signal Vref1 and the first power supply voltage signal PVEE simultaneously begin adjusting their voltages. At the end of voltage switching phase S1, the first power supply voltage signal PVEE is adjusted to the target voltage, and the first reset signal Vref1 is also adjusted to the target voltage. That is, the first reset signal Vref1 and the first power supply voltage signal PVEE complete voltage switching simultaneously. With this setting, the voltage difference between the anode and cathode of the light-emitting device D0 can remain consistent or basically consistent before and after adjustment, which is beneficial to stabilizing the voltage difference between the anode and cathode of the light-emitting device D0. This helps to improve the screen flickering phenomenon of the display panel 100, improve the display effect of the display panel 100, and enhance the user experience.

[0078] Please continue to refer to this. Figure 1 , Figure 2 , Figure 4 and Figure 9 In one optional embodiment of this disclosure, the display phase of the display panel 100 includes an effective display phase ACT and a front and rear corridor phase Porch.

[0079] The power management integrated circuit 20 adjusts the first power supply voltage signal PVEE during the front and rear corridor stages;

[0080] During the front and rear corridor stages, the driver chip 10 adjusts the first reset signal Vref1 via Porch.

[0081] Specifically, the display phases of the display panel 100 include an effective display phase (ACT) and a front and rear corridor phase (Porch). The front and rear corridor phases (Porch) are pre-charging phases corresponding to each driving cycle. During this phase, no sub-pixels in the display panel 100 are scanned, i.e., no light-emitting devices (D0) are driven. The effective display phase (ACT) is the time period during which the sub-pixels in the display panel 100 are actually scanned, and during this phase, the light-emitting devices (D0) in the display panel 100 are driven. In this embodiment, the power management integrated circuit 20 adjusts the first power supply voltage signal PVEE during the front and rear corridor phases (Porch), and the driver chip 10 adjusts the first reset signal Vref1 during the front and rear corridor phases (Porch). During the front and rear corridor phases (Porch), the display panel 100 is not in an effective display state. Therefore, switching during the front and rear corridor phases (Porch) helps to reduce the impact on the display effect of the display panel 100, reduce the occurrence of screen flickering problems, and improve the display effect.

[0082] As can be seen from the above embodiments, the display panel, driving method, and display device provided in this disclosure achieve at least the following beneficial effects:

[0083] This disclosure provides a display panel and its driving method and display device. The display panel includes multiple light-emitting devices. The anode of each light-emitting device is electrically connected to a first reset signal, and the cathode is electrically connected to a first power supply voltage signal. The first reset signal is used to reset the anode of the light-emitting device, and the first power supply voltage signal is used to provide a voltage signal to the cathode of the light-emitting device. The display panel includes multiple brightness levels. The driving method of the display panel includes: when the brightness level of the display panel changes, the first reset signal and the first power supply voltage signal simultaneously begin switching. This configuration helps to shorten the time difference between the activation time of the first reset signal and the activation time of the first power supply voltage signal, thereby improving the screen flicker phenomenon of the display panel, improving the display effect of the display panel, and enhancing the user experience.

[0084] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0085] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A driving method for a display panel, characterized in that, The display panel includes multiple light-emitting devices. The anode of each light-emitting device is electrically connected to a first reset signal, and the cathode is electrically connected to a first power supply voltage signal. The first reset signal is used to reset the anode of the light-emitting device, and the first power supply voltage signal is used to provide a voltage signal to the cathode of the light-emitting device. The display panel includes multiple brightness levels; The driving method for the display panel includes: When the brightness level of the display panel changes, the first reset signal and the first power supply voltage signal start switching simultaneously. The display panel includes an effective display phase and a front and rear corridor phase within its display phase; The switching time between the first reset signal and the first power supply voltage signal is during the front and rear corridor stage.

2. The driving method for the display panel according to claim 1, characterized in that, The switching process of the first reset signal and the first power supply voltage signal is the same.

3. The driving method for the display panel according to claim 2, characterized in that, Includes a voltage switching phase, in which the first power supply voltage signal is adjusted from a first sub-power supply voltage value to a second sub-power supply voltage value, and the first reset signal is adjusted from a first sub-reset voltage value to a second sub-reset voltage value; At the beginning of the voltage switching phase, the voltage of the first power supply voltage signal is equal to the first sub-power supply voltage value, and the voltage of the first reset signal is equal to the first sub-reset voltage value. At the end of the voltage switching phase, the voltage of the first power supply voltage signal is equal to the second sub-power supply voltage value, and the voltage of the first reset signal is equal to the second sub-reset voltage value.

4. The driving method for a display panel according to claim 1, characterized in that, Includes a first power supply voltage signal switching stage, in which the first power supply voltage signal is adjusted from a first sub-power supply voltage value to a second sub-power supply voltage value. The duration of the first power supply voltage signal switching phase is less than or equal to the duration of a single front and rear corridor phase.

5. The driving method for a display panel according to claim 4, characterized in that, At the end of the front and rear corridor phase, the voltage value of the first power supply voltage signal is equal to the voltage value of the second sub-power supply voltage.

6. The driving method for a display panel according to claim 4, characterized in that, This includes the time when the first reset signal is generated, which is located at the beginning of the first power supply voltage signal switching phase. At the moment the first reset signal is generated, the voltage of the first reset signal is equal to the value of the second sub-reset voltage.

7. A display panel, characterized in that, The display panel is driven using the driving method described in any one of claims 1 to 6.

8. A display device, characterized in that, Including the display panel as described in claim 7, The display panel includes multiple light-emitting devices. The anode of each light-emitting device is electrically connected to a first reset signal, and the cathode is electrically connected to a first power supply voltage signal. The first reset signal is used to reset the anode of the light-emitting device, and the first power supply voltage signal is used to provide a voltage signal to the cathode of the light-emitting device. The display panel includes multiple brightness levels; A power management integrated circuit, wherein the first power supply voltage signal is electrically connected to the power management integrated circuit, and the power management integrated circuit adjusts the first power supply voltage signal when the brightness level of the display panel changes; The driver chip is electrically connected to the first reset signal. When the brightness level of the display panel changes, the driver chip adjusts the first reset signal. The display panel includes an effective display phase and a front and rear corridor phase within its display phase; The power management integrated circuit adjusts the first power supply voltage signal during the front and rear corridor phases. The driver chip adjusts the first reset signal during the front and rear corridor phases.

9. The display device according to claim 8, characterized in that, When the brightness level of the display panel changes, The power management integrated circuit controls the first power supply voltage signal to be adjusted from the first sub-power supply voltage value to the second sub-power supply voltage value; The driver chip controls the first reset signal to be adjusted from a first sub-reset voltage value to a second sub-reset voltage value.

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